We show that restricting a number of characterizations of the complexity class P to be positive (in natural ways) results in the same class of (monotone) problems which we denote ...
Clemens Lautemann, Thomas Schwentick, Iain A. Stew...
: We introduce a generalization of Selman's P-selectivity that yields a more exible notion of selectivity, called polynomial-time multi-selectivity, in which the